/* uio.h - uio header file */

/* Copyright 1984-1996 Wind River Systems, Inc. */

/*
 * Copyright (c) 1982, 1986, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)uio.h	8.5 (Berkeley) 2/22/94
 */

/*
modification history
--------------------
01b,13dec99,jkf  added #ifndef _ASMLANGUAGE
01a,13mar96,vin  upgraded to 4.4, integrated with 02h of uio.h
*/

#ifndef __INCuioh
#define __INCuioh

#ifdef __cplusplus
extern "C" {
#endif

#include "sys/types.h"

#ifndef _ASMLANGUAGE

#if ((CPU_FAMILY==I960) && (defined __GNUC__))
#pragma align 1                 /* tell gcc960 not to optimize alignments */
#endif	/* CPU_FAMILY==I960 */

struct iovec {
	caddr_t	iov_base;
	int	iov_len;
};

enum	uio_rw { UIO_READ, UIO_WRITE };

/* Segment flag values. */
enum uio_seg {
	UIO_USERSPACE,		/* from user data space */
	UIO_SYSSPACE,		/* from system space */
	UIO_USERISPACE		/* from user I space */
};

struct uio {
	struct	iovec *uio_iov;
	int	uio_iovcnt;
	off_t	uio_offset;
	int	uio_resid;
	enum	uio_seg uio_segflg;
	enum	uio_rw uio_rw;
#ifdef UNIXBSD44		/* does not apply to vxWorks */
	struct	proc *uio_procp;
#endif 
};

#if ((CPU_FAMILY==I960) && (defined __GNUC__))
#pragma align 0                 /* turn off alignment requirement */
#endif	/* CPU_FAMILY==I960 */

#define UIO_MAXIOV	1024		/* max 1K of iov's */
#define UIO_SMALLIOV	8		/* 8 on stack, else malloc */

#endif /* #ifndef _ASMLANGUAGE */

#ifdef __cplusplus
}
#endif

#endif /* __INCuioh */
